Out of all the estate agents we spoke to we chose White & Russell as they provided us with an accurate valution and understood our position when we went onto the market (i.e. weren't pushy). When they showed people round, they gave us plenty of notice, were respectful of our property, and were always there on time when someone visited. They were also excellent to deal with on the phone. And we never felt put under any pressure.
All in all, we experienced top level service from start to finish, which is rare to find these days.